Called Sprint... They provided the MSL number instantly and that finished the Zero Out Reset process which removed my phone number from the MDN & MIN.

Folks need to know that this too is an important step that must be taken to complete the Zero Out Reset process. Once you have done the Zero Out Reset steps check the MDN & MIN numbers by pressing ##786# to ensure that your phone number is not stored as the MDN & MIN numbers. Otherwise, you will have to call your service provider as well, if you don't have the Master Subsidy Lock [MSL] 6 digit number number to unlock the phone.

Once you are at the ##786# screen, hit the menu key, select RESET, enter MSL number, select OK. That's it...

Now the Treo650 phone is 100% secure as all phones that are sold or the ownership is transferred should be.